Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2017

Fair Value By Balance Sheet Grouping [Text Block]

		Level 1		Level 2		Level 3		Total
Assets:
Current derivative asset	$	-	$	14	$	-	$	14

Liabilities:
Current derivative liability	$	-	$	13,232	$	-	$	13,232

Carrying values and estimated fair values of finanical nstruments

		March 31, 2017(1)				December 31, 2016
		Carrying		Estimated		Carrying		Estimated
		Amount		Fair Value		Amount		Fair Value

7.31% Notes due March 2016, issued 2009		62,000		62,000		62,000		64,266
4.98% Notes due January 2017, issued 2010		116,000		116,000		116,000		123,967
5.92% Notes due March 2018, issued 2008		200,000		200,000		200,000		224,025
5.75% Notes due December 2018, issued 2013		450,000		450,000		450,000		465,630
7.77% Notes due March 2019, issued 2009		173,000		173,000		173,000		204,854
5.50% Notes due January 2020, issued 2010		207,000		207,000		207,000		233,932
4.51% Notes due October 2020, issued 2010		315,000		315,000		315,000		337,528
5.60% Notes due January 2022, issued 2010		87,000		87,000		87,000		99,983
4.66% Notes due October 2022, issued 2010		35,000		35,000		35,000		38,225
6.125% Notes due October 2024, issued 2014		850,000		850,000		850,000		893,325
5.85% Notes due January 2025, issued 2010		90,000		90,000		90,000		106,299
4.91% Notes due October 2025, issued 2010		175,000		175,000		175,000		193,665
Credit Facility due October 2016		999,000		999,000		999,000		999,000
	$	3,759,000	$	3,759,000	$	3,759,000	$	3,984,699

⁽¹⁾At March 31, 2017, the debt included in the table above is a component of liabilities subject to compromise in our Consolidated Balance Sheets. See Note 1. The carrying amounts of debt securities at March 31, 2017 are considered reasonable estimates of their fair values due to the short-term maturity of these financial instruments as described in our Plan of Reorganization confirmed by the Court on March 14, 2017 and subsequently executed upon on April 12, 2017.